root@8693c627f5de:/concurrent-ruby# bundle exec rake repackage
YARD is not installed, skipping documentation task definitions: cannot load such file -- yard
rm -r pkg
rm -r pkg
rm -r pkg
mkdir -p pkg
WARNING: You're cross-compiling a binary extension for JRuby, but are using
another interpreter. If your Java classpath or extension dir settings are not
correctly detected, then either check the appropriate environment variables or
execute the Rake compilation task using the JRuby interpreter.
(e.g. `jruby -S rake compile:java`)
rake aborted!
Could not find jruby.jar. Please set JRUBY_HOME or use jruby in rvm
/var/lib/gems/2.5.0/gems/rake-compiler-1.1.0/lib/rake/javaextensiontask.rb:268:in `java_classpath_args'
/var/lib/gems/2.5.0/gems/rake-compiler-1.1.0/lib/rake/javaextensiontask.rb:111:in `block in define_compile_tasks'
/var/lib/gems/2.5.0/gems/rake-13.0.1/exe/rake:27:in `<top (required)>'
/var/lib/gems/2.5.0/gems/bundler-2.1.4/lib/bundler/cli/exec.rb:63:in `load'
/var/lib/gems/2.5.0/gems/bundler-2.1.4/lib/bundler/cli/exec.rb:63:in `kernel_load'
/var/lib/gems/2.5.0/gems/bundler-2.1.4/lib/bundler/cli/exec.rb:28:in `run'
/var/lib/gems/2.5.0/gems/bundler-2.1.4/lib/bundler/cli.rb:476:in `exec'
/var/lib/gems/2.5.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
/var/lib/gems/2.5.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
/var/lib/gems/2.5.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor.rb:399:in `dispatch'
/var/lib/gems/2.5.0/gems/bundler-2.1.4/lib/bundler/cli.rb:30:in `dispatch'
/var/lib/gems/2.5.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor/base.rb:476:in `start'
/var/lib/gems/2.5.0/gems/bundler-2.1.4/lib/bundler/cli.rb:24:in `start'
/var/lib/gems/2.5.0/gems/bundler-2.1.4/exe/bundle:46:in `block in <top (required)>'
/var/lib/gems/2.5.0/gems/bundler-2.1.4/lib/bundler/friendly_errors.rb:123:in `with_friendly_errors'
/var/lib/gems/2.5.0/gems/bundler-2.1.4/exe/bundle:34:in `<top (required)>'
/usr/local/bin/bundle:23:in `load'
/usr/local/bin/bundle:23:in `<main>'
Tasks: TOP => repackage => package => gem => pkg/concurrent-ruby-1.1.6.gem => pkg/concurrent-ruby-1.1.6 => lib/concurrent-ruby/concurrent/concurrent_ruby.jar => copy:concurrent_ruby:java => tmp/java/concurrent_ruby/concurrent_ruby.jar => tmp/java/concurrent_ruby/.build
(See full trace by running task with --trace)